APA (7th ed.) Citation
Haas, A. L., Wickham, R., Macia, K., Shields, M., Macher, R., & Schulte, T. (2015). Identifying classes of conjoint alcohol and marijuana use in entering freshmen. Psychology of Addictive Behaviors, 29(3), 620-627.
Chicago Style (17th ed.) Citation
Haas, Amie L., Robert Wickham, Kathryn Macia, Micah Shields, Rayna Macher, and Tilman Schulte. "Identifying Classes of Conjoint Alcohol and Marijuana Use in Entering Freshmen." Psychology of Addictive Behaviors 29, no. 3 (2015): 620-627.
MLA (9th ed.) Citation
Haas, Amie L., et al. "Identifying Classes of Conjoint Alcohol and Marijuana Use in Entering Freshmen." Psychology of Addictive Behaviors, vol. 29, no. 3, 2015, pp. 620-627.
Warning: These citations may not always be 100% accurate.